如何在iphone中顯示細胞倒計時器？

Question

**我在單元格上顯示倒計時器，當我長按cell.but但問題是，當我點擊行定時器開始，但突然當我點擊第二個單元計時器停止前一個單元格，並啓動計時器新細胞，我點擊，但我需要的主要功能是我必須顯示運行前一個計時器和當前計時器。請任何人給我這種權利的方式。**

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer 
{ AppDelegate *app=(AppDelegate *)[UIApplication sharedApplication].delegate; 
    CGPoint p = [gestureRecognizer locationInView:ChatTable]; 
    NSIndexPath *indexPath = [ChatTable indexPathForRowAtPoint:p]; 


if ([[[userArray valueForKey:@"sender_id"] objectAtIndex:indexPath.row]isEqualToString: app.userId]) { 

} 

else{ 

    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) 
    { 

     if ([imageCache objectForKey:[NSString stringWithFormat:@"%d",indexPath.row]]==NULL) { 

     } 
     else 
     { 
      self.picId=[[userArray valueForKey:@"pic_id"] objectAtIndex:indexPath.row]; 
      self.imageName=[[userArray valueForKey:@"imagename"] objectAtIndex:indexPath.row]; 
      ChatTable.userInteractionEnabled=NO; 
      // self.navigationController.navigationBarHidden=YES; 
      image=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)]; 
      self.pickerValue=[[userArray valueForKey:@"seconds"] objectAtIndex:indexPath.row]; 
      image.image=[imageCache objectForKey:[NSString stringWithFormat:@"%d",indexPath.row]]; 
      [self.view addSubview:image]; 
      [self showTableTime:indexPath]; 
     } 
    } 
    else if (gestureRecognizer.state == UIGestureRecognizerStateEnded) { 
     UITableViewCell * myCell = [ChatTable cellForRowAtIndexPath:indexpathForTimer]; 
     UILabel * myLabel = (UILabel *)[myCell viewWithTag:101]; 
     myLabel.text=@""; 
     // self.navigationController.navigationBarHidden=NO; 
     [image removeFromSuperview]; 
    } 

} 

} 

-(void)showTableTime:(NSIndexPath *)indexPath 
{ 
    secondsLeft=[self.pickerValue integerValue]; 
    indexpathForTimer=indexPath; 
    [self countDownTimer]; 

} 

- (void)countDownTimer { 

    timer =[NSTimer scheduledTimerWithTimeInterval:1.0 target:self   selector:@selector(updateCounter:) userInfo:nil repeats:YES]; 

    } 
    - (void)updateCounter:(NSTimer *)theTimer { 

UITableViewCell * myCell = [ChatTable cellForRowAtIndexPath:indexpathForTimer]; 
UILabel * myLabel = (UILabel *)[myCell viewWithTag:101]; 
if (secondsLeft >0) { 
    secondsLeft --; 
    UILabel * myLabel = (UILabel *)[myCell viewWithTag:101]; 
    myLabel.text=[NSString stringWithFormat:@"0%d",secondsLeft]; 

} 
else if(secondsLeft==0) 
{ 
    [self.image removeFromSuperview]; 
    [timer invalidate]; 
    ChatTable.userInteractionEnabled=YES; 
    myLabel.text=@""; 
    [self SendRequsetToServerOfSeenImage]; 

} 
else 
{ 
} 


} 

Answer 1

的問題是，你只存儲一個定時器/ indexpath對（你只使用變量「定時器」， 「indexPathForTimer」）。只要激活第二個單元格，變量indexPathForTimer將被第二個單元格的indexPath覆蓋，因此您只更新第二個單元格。

我建議你轉換變量計時器到一個NSMutableArray和indexPathForTimer到NSMapTable，然後做

// code to init the map table, perform this where you initialize your variables 
// (you may want to use weakToStrong or weakToWeak depending on your memory 
// management) 
indexPathForTimer = [NSMapTable strongToStrongObjectsMapTable]; 

// use this code to create your timer instance with reference to the index path 
// for which it was instantiated 
NSTimer* newTimer = [NSTimer timerWithTimerInterval:1.0 target:self selector:@selector(updateCounter:) userInfo:nil repeats:YES]; 
[timer addObject:newTimer]; 
[indexPathForTimer addObject:indexPath forKey:newTimer]; 
[NSRunLoop mainRunLoop] addTimer:newTimer forModes:NSRunLoopCommonModes]; 

在你updateCounter：方法，你就可以得到像這樣

currentIndexPath = [indexPathForTimer objectForKey:theTimer]; 

真正的索引路徑

Answer 2

試試這個

- (void)countDownTimer 
{ 

timer =[NSTimer scheduledTimerWithTimeInterval:1.0 target:self   selector:@selector(updateCounter:) userInfo:nil repeats:YES]; 
[[NSRunLoop mainRunLoop]addTimer:timer forMode:NSRunLoopCommonModes]; 

} 

Answer 3

我想你想在視圖上或每個單元上運行多個定時器。但處理運行在不同單元上的多個定時器會變得很複雜。